Solar radius measurements (535.7, 607.1, and 782.2 nm) obtained from PICARD/SODISM measurements during the Venus transit. The solar radius at 1 au (no distortion correction) is plotted with black squares, and the solar radius at 1 au (with distortion correction) is plotted with circles. r represents the distance from the center of the Sun image on the SODISM CCD to the solar limb (11.5 mm). We are particularly interested in the values at the solar limb; the PICARD/SODISM telescope is focused on this position.